User`s guide

EATON Powerware
®
9155 UPS-Mounted Bypass Switch (8–15 kVA) User's Guide S 164201644 Rev A www.eaton.com/powerquality
1
Chapter 1 Introduction
The Maintenance Bypass Module (MBM) and Power Distribution Module (PDM) are
designed to work with an 8–15 kVA Powerware
®
9155 uninterruptible power system
(UPS). Both modules provide a Make-Before-Break (MBB) wrap-around bypass for
UPS maintenance or service without shutting down the load. The PDM also comes
equipped with several different types of output receptacles.
Safety Warnings
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that you should follow during installation and maintenance of
the UPS and batteries. Please read all instructions before operating the equipment and save this manual for
future reference.
D A N G E R
This UPS contains LETHAL VOLTAGES. All repairs and service should be performed by AUTHORIZED
SERVICE PERSONNEL ONLY. There are NO USER SERVICEABLE PARTS inside the UPS.
W A R N I N G
S This UPS contains its own energy source (batteries). The UPS output may carry live voltage even when
the UPS is not connected to an AC supply.
S To reduce the risk of fire or electric shock, install this UPS in a temperature and humidity controlled,
indoor environment, free of conductive contaminants. Ambient temperature must not exceed 40°C
(104°F). Do not operate near water or excessive humidity (95% maximum).
S To reduce the risk of fire, connect only to a circuit provided with 100 amperes maximum branch circuit
overcurrent protection in accordance with the National Electrical Code, ANSI/NFPA 70.
S Output overcurrent protection and disconnect switch must be provided by others.